I just ran SunSpider Benchmark for Safari (32 bit and 64 bit), Firefox, Chrome, and Opera (all the most recent versions) just to see what I results I would get. I have a first generation Mac Pro, 11 GB of RAM and 4 750 GB Hard drives. Everything else is standard equipment as it came from Apple when new. I ran the benchmarks one at a time with nothing else running on the machine; all conditions were exactly alike for each test.
Here are the results (and their interesting):
Safari (32 Bit)..........467.4 ms +/- 0.6%
Safari (64 Bit)..........402.2 ms +/- 0.9%
Chrome...................332.2 ms +/- 2.9%
Firefox....................928.0 ms +/- 2.7%
Opera.....................379.8 ms +/- 0.8%
Its interesting that Chrome and Opera are the clear winners here. Safari 64 bit is not far behind, Safari 32 bit is not so hot, but Firefox is the real dog in these tests.
There is much more to the overall quality and value of a browser than just Java performance, however, these results are telling.
However, when running a Hulu TV show (SGU Episode) in high resolution and full screen on my 30" Apple Cinema display the playback rate was much worse then it was in the last version of Chrome (where it was actually better than on all the other browsers before the upgrade).
Dave